Combined drilling and grinding machine



Sept. so 1924;

1.. 'AMBROSIO COMBINED DRILLING AND GRINDING MACHINE Filed July 20. 1923 ATTORNEY WITNE Patented Sept. 39, 1924.

LOUIS AMBRQSIO, OF RICHMOND HILL, NEW

Application filed July 20, 1923.

To all whom it may concern:

lie it known that LOUIS AMnnosIo, a citizen of the United States, residing at Richmond Hill, in the county of Queens and State of New York, has invented new and useful Improvements in Combined Drilling and Grinding Machines, of which the following is a specification.

This invention relates to a combined drilling and grinding machine.

The principal object of the invention is the provision of a machine of the class mentioned wherein is included a mechanism for transmitting rotary movement to a drilling element, and'a mechanism for imparting a oscillatory movement to a grinding element, both mechanisms being driven from a single drive shaft, but not simultaneously.

Another obiect is to provide a machine of this kind for use by motorists whereby it is possibleto grind the valves of an internal combustion engine of an automobile, or as a drill for boring purposes when such tool may be needed. 1 i

A still further obiect of the invention is to provide a drilling or grinding machine which is so compact-as to permit the same to be stored in a comparatively small space, the same being simple in construction, easy of operation, and highly eflicient for the pur pose intended,

lith these and other objects in view the invention resides in the certain novel construction. combination and arrangement of parts. the essential. features of which are hereinafter fully described in the specifica tion. are pointed out in the appended claims and are illustrated in the accompanying drawing in which:

Figure 1 is a side elevation of my im- 1 proved drilling and grinding machine.

Figure 2 is a vertical sectional view therethrough.

Figure 3 is a horizontal sectional view on the line 33 of Figure 2.

Figure 4 is a detail vertical sectional view on the line 4-4 of Figure 2.

Like characters of reference refer to like parts throughout the several views of the drawing.

Referring more particularly to the drawing the invention com-prises primarily a drilling mechanism 10, a grinding mechanism 11, and a source of power in the nature of an electric motor 12, whereby the mechaii COMBINED DRILLING AND GRINDING IVIACIEIINE.

Serial No. 652,837.

nisms 10 and 11 derive their power but not simultaneously. The mechanisms 10 and 11 are enclosed in a suitable housing 13, having a removabl cover section 14 bolted or otherwise secured to the housing 13 so that access may be had to the inner working parts. The motor 12 is supported above the housing 13 and is enclosed in a suitable casing 15 bolted or otherwise secured to the top of the housing. The numeral 16 designates a motor shaft which has its bearing in the top wall of the housing 13 and is provided at its free end with the square recess 17 for receiving the squared end 18 of a driven shaft 19. The shaft .19 is provided. with a double gear 20 and a collar 21 for a purpose to be presently described.

The drilling mechanism 10 comprises a shaft 22 having its hearings in the top and bottom walls of the housing 13, the extreme lower end of which is provided with a sui able chuck 23 for interchangeably receiving a suitable drillingelement such as that shown at 2%. Near the upper end of the shaft 22 and keyed thereon is a bevel gear 25 for co-action with the upper portion of the double gear 20 for taking power from theshaft 19 and transmitting it to the shaft 22 whereby a rotary movement is imparted to the drilling element 24:.

The grinding mechanism 11 is intended to transform the rotary motion of the shaft 19 into an oscillatory movement for operating thegrinding clement about to be described. The grinding mechanism, 11 includes a crank shaft 26 mounted horizontally within the housing 13 and having one oi its hearings in the side wall of the housing and the other of its hearings in a suitable hracket 27 whereby it is possible to remove the cover section 14 without remov ing the shaft from its hearings. Keyed to the crank shaft 26 is bevel gear 28 for coaction with the lower gear of the double gear 20 for transmitting power to the crank shaft 26. Secured to the crank shaft 26 at the crank portion thereof is a connecting rod 29 for imparting a'reciprocating movement to the rack bar 30, the connection between the connecting rod 29 and the rack bar 30 being in the nature of a universal joint 31. In order to guide the rack bar in its vertical movements, I provide a suitable slot 33 for the reception of the portion 341 formed on the rack bar 30. The teeth of the rack bar are adapted to mesh with the teeth of a gear wheel one face of which is provided with a bevel gear 36 for coaction with the bevel gear 37 keyed to one end of a shaft 38 having its bearing in the bottom wall of the housing 13. The free end of the shaft 38 is adapted to interchangeably receive a suitable grinding tool 39 for co-action with any suitable type of valve. It will be seen that when the double gear is in mesh with the gear 28, a reciprocating motion will be in'iparted to the rack bar 30, and a rack bar in' turn will impart oscillatory movement to the grinding tool 39 through the gears and 37.

In order to shift the double gear 20 into and out of engagement with the gears 2-5 and 28 of the drilling and grinding mechanisms respectively, I 'employ an arm 40 having one of its ends formed withan oval shaped opening 411 for the reception of the collar 21, the arm 40 in turn being pivoted as at 412 and having its other end connected to a manipulating rod 43, having its bearing in the housing 13 and extending above the same. Normally the double gear 20 is in mesh with the gear 28 and when it is desired to move the same up into engagement with the gear 35, pressure is applied to the manipulating rod 43 to move the arm 40 about its pivot so as to cause the shaft 1.9 to slide upward, it being understood that the squared end 18 is slidable in the recess 17 of the motor shaft. In order to hold the double gear in either its upward or lower position, I form the manipulating rod 13 with a plurality of notches' le for co-action with a suitable dog 45 pivoted to the casing 15. Extending from the casing 15 is a pair of push buttons 46 whereby to push one button will cause a relatively slow movement of the motor for use when operating the valve grinder and to push the other button will cause the motor to run at its full speed for operation of the drill. Also I provide the casing 13 and its cover 14 with a pair of grab handles 17 whereby the machine may be held in a position above the work.

herein there has been shown and described what is deemed the best embodiment of my invention I wish it to be understood that changes, alterations, and modifications as come within the claims may be resorted to when desired.

What is claimed as new is:

1. In a combined drilling and grinding machine, a housing, a motor, a shaft rotable by said motor, a double gear formed on the free end of said shaft, a drilling element, a vertical shaft journa'led in said housing and having a gear for co-action with the double gear for transmitting rotary movement to said-drilling element, a crank shaft journaled in said housing and having a gear thereonfor co -action with said double gear, and means operable by said crank shaft for imparting oscillatory movement to said grinding element, and shifting means for said double gear for rendering one of said gears operative andthe other of said gears inoperative.

2. In a combined drilling and grinding machine, a housing, a motor mounted above said housing, a shaftoperable by said motor and formedwith a double gear extending into said housing, a drilling element, means operable hysaid double gear for transmitting rotary movement from said shaft to said drilling element, a grinding element, means operable by said double gear for imparting oscillatory'movement to said grinding element, said last means including a crank shaft mounted horizontally in said housing, a gear mounted on said crank shaft, a rack bar operable by saithcrank shaft, anda train rack. I

3. In a combined drilling and grinding machine, a housing, a motor mounted above said housing, ashaft operable by said'mot'or and formed with a double gear extending into said housing, a drilling element, means operable by said double'gear for transmitting rotary movement "from said shaft to said drilling element, a grinding "element, means operable by saiddoirb'le gear for im parting oscillatory movementto saidjgrinding element, said last means including a crank shaft mounted horizontally in said housing, a gear mounted on said crank shaft, a rack bar operable'by said crank shafta train of gears operable by sai'd'rack, and shifting means for said double gear for rendering one of said means operative and the other of said means inoperative.

at. A grinding machine comprising a housing, a motor driven shaft, "a gear on said shaft, a crank shaft horizontally mounted in said housing, agear mounted on said crank shaft and adapted to mesh with said first gear. a reciprocating rack bar operable by said crank shaft, a grinding element, and means operable 'by 'said rack bar for imparting oscillatory movement'to said grinding element.

In testimony whereof I have affixed my signature.

of g'earsop'erabl e by said LOUIS AMBROSIO. 

